蒲公英的种子像“小伞”,苍耳的种子,果实上有刺,这属于() A.遗传和变异 B.地理

题型:单项选择题

问题:

蒲公英的种子像“小伞”,苍耳的种子,果实上有刺,这属于()

A.遗传和变异

B.地理隔离

C.生存斗争

D.生物的适应性

考点:高考生物高考生物题库
题型:单项选择题

《特种设备安全监察条例》规定,下列特种设备中的()的设计文件,应当经国务院特种设备安全监督管理部门核准的检验检测机构鉴定,方可用于制造.

A.锅炉、气瓶、氧舱

B.客运索道、大型游乐设施

C.电梯、起重机械

D.压力管道

题型:单项选择题

I’m very glad to receive your letter. From your letter, I know you have shown  小题1:  great interest in inventing new things. That’s great. As for how to be an inventor, there is no quick answer to   小题2: .

Coming from different cultures and having different backgrounds, inventors do not seem to have much  小题3: common.  But creative thinking,   小题4: is greatly valued, is perhaps the basic skill an inventor should have. In order to explore new possibilities, you will have to learn to break 小题5:    from old thought patterns. When you get stuck, try to look at the problem in        小题6:    many ways as possible. Each new way may improve your understanding.

More importantly, always keep it in your mind   小题7: success is no accident. It is the result of a long process of trial and error. Above  小题8:  , the main task for you is to study hard and try to learn more knowledge. This, of course, will lay a solid foundation.

Hope your future invention will make a difference.

Good  luck                                                                                        

Yours,

Wang Li

题型:单项选择题

白血病患者化疗期间口服别嘌呤醇的目的是()

A.抑制尿素合成

B.加强化疗药的疗效

C.抑制尿酸合成

D.加强尿酸的排泄

E.加强尿素的排泄

题型:单项选择题

肥胖者伴有降低的指标为()

A.血甘油三酯

B.血胆固醇

C.糖耐量

D.血糖

E.血游离脂肪酸

题型:单项选择题

下面关于火灾和烧烫伤的知识错误的是?()

A、青少年中,只有部分烧烫伤是由于滚烫的液体、水龙头中的热水或是蒸汽造成的

B、滚烫的开水泼溅到了你的身上,不到一秒钟就会烫伤你的皮肤

C、30秒,足以使一个小小的火苗演变成重大的火灾

D、火灾发生后的几分钟,整个房间都会充满浓浓的黑烟

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